In this series:Steroid injectionsOral steroidsTopical steroidsFingertip units for topical steroidsSteroid nasal sprays The letters α and β[18] denote absolute stereochemistry at chiral centers—a specific nomenclature distinct from the R/S convention[19] of organic chemistry to denote absolute configuration of functional groups, known as Cahn–Ingold–Prelog priority rules. The R/S conve... https://www.fcc.gov/fcc-bin/bye?https://tr.wikipedia.org/wiki/Vitamin